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[WIP] Harmonize solvers #1030
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[WIP] Harmonize solvers #1030
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Logging prevents app from reporting exception to commandline
PETSc applies preconditioners by default
Shift to relative imports
We should stop nannying (or inherit ABC)
Different solver suites have different preconditioners, so too complicated to try to capture all in a single loop. Choose suite and preconditioner at calling level.
It was only ever an alias, anyway
RHS >> initial residual, so solver never does anything with (new) default criterion for convergence.
Still passes and doesn't throw obnoxious warnings from PETSc or Trilinos
It just gets in the way
Default solver tolerances have been relaxed from 1e-10 to 1e-5 to agree with default of most solver suites. This should save on compute time and, in most cases, this is adequate for existing tests to pass. Where it is not, either adjust the solver or adjust the test.
Originally tried to make it do logging, too, but I couldn't figure out how to get it to log in the correct scope. Separating timing from logging substantially simplifies the logic at a modest cost in LoC at point of use.
Terms should, in principle, be solvable for different variables.
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